Whats the difference between expenisve and cheap cd-r' s?

[disposable_teens]

Can someone please explain what the difference is between expensive and cheap cd'r 's. No matter what you pick up in the store they claim to be A+ Quality. I never bought cheap cd-r before but if there is not a major difference (for copying psx games especially) then I might as well buy cheap ones. Right now I buy SONY 650mb/74min CDQ-74CN XQ cd-r's. Is this sony product good? They werent too expensive.